This document discusses non-verbal communication principles including kinesics, proxemics, paralanguage, and visible codes. It defines non-verbal communication as comprising 55% visual communication, 38% vocal communication, and 7% verbal communication. The different types of non-verbal communication covered are body language, paralanguage, space language, time language, and sign language. Guidelines to improve non-verbal communication include monitoring your own non-verbal cues, learning to interpret others, developing self-awareness, observation skills, and asking for feedback.